The American journal of anatomy . n section. The superficial layer, 17 micra in thickness atits thickest portion, stains but faintly in eosin. It consists of cellsof irregular polygonal shape similar to those of the stratum corneumof the epidermis with the exception that remains of the nucleus areto be found in them, in the form of shrunken remains of the nuclearmembrane and one or two chromatic particles. 8 JKniil Goetsch. The stratum germinativum requires no special comment exceptthat its superficial layers contain no granules of eleidin. There is a gradual reduction in thickness of the epit
The American journal of anatomy . n section. The superficial layer, 17 micra in thickness atits thickest portion, stains but faintly in eosin. It consists of cellsof irregular polygonal shape similar to those of the stratum corneumof the epidermis with the exception that remains of the nucleus areto be found in them, in the form of shrunken remains of the nuclearmembrane and one or two chromatic particles. 8 JKniil Goetsch. The stratum germinativum requires no special comment exceptthat its superficial layers contain no granules of eleidin. There is a gradual reduction in thickness of the epithelium goingdown the oesophagus. At the middle it is from 58-170 micra inthickness with a corneous layer 35 micra in thickness. The super-ficial layer of the corneous stratum here consists only of scatteredcells of the sort described above. At the point where the permanent transverse folds make theirappearance about 1 cm. above the cardia there is a change in thecharacter of the epithelium. On the surface and sides of these folds. .Epithelium Lam innpro prin Pig. 2. Epithelium from side of transverse folds at lower end of oesophagusof Didelphys. x 750. the epithelium varies from a double layer of cubical to polygonalcells, 10 micra in thickness (Fig. 2), to several layers of cells, thesuperficial layers flattened, 50 micra in thickness. The thin doublelayer of cells is found here and there on the sides of the transversefolds, the thicker epithelium on the summits. As shown in Fig. 2there is frequently no sign at all of cornification of the superficiallayer. The lamina museularis mucosae is longitudinal in direction and isfound throughout the whole oesophagus. At the lower level of thecricoid cartilage1 it makes its appearance as scattered bundles of The Structure of the Mammalian (Esophagus. 9 unstriated muscle. At the middle of the oesophagus it forms a con-tinuous layer of considerable thickness (205 micra in an animal of3 kg.) and increasing to 420 micra at the cardiac orifi
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectanatomy, bookyear1910
